Koolunga Weather Records (ASN00021029)

Record envelope, standing records and threshold days for Koolunga (ASN00021029), Australia, with 143 years of record.

Key Facts for Koolunga

Koolunga (ASN00021029) is a weather station in Australia at -33.59 latitude and 138.33 longitude, 125 m (410 ft) above sea level.
The station reports from 1884 to 2026, 143 years of record.
0 records set at Koolunga still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Koolunga set a daily record precipitation of 18.2 mm (0.7 in) on 10 August 2026.

About the Station

Location: Australia, -33.59 latitude, 138.33 longitude.
Elevation: 125 m (410 ft).
Period of record: 1884 to 2026, 143 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Koolunga. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Koolunga, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Koolunga still stand.

Wettest Day of Each Month

Apr: 103.9 mm (4.1 in)

The wettest day on record for each calendar month at Koolunga. The most was 103.9 mm (4.1 in) on 2 April 1889.

Record daily precipitation for each month at Koolunga
Month	Record daily precipitation (mm)	Date
Jan	57.4 mm (2.3 in)	25 January 1941
Feb	86.6 mm (3.4 in)	6 February 1973
Mar	75.2 mm (3.0 in)	5 March 1910
Apr	103.9 mm (4.1 in)	2 April 1889
May	44.8 mm (1.8 in)	13 May 1974
Jun	53.0 mm (2.1 in)	6 June 1994
Jul	33.0 mm (1.3 in)	18 July 1917
Aug	32.8 mm (1.3 in)	22 August 1908
Sep	42.7 mm (1.7 in)	1 September 1908
Oct	68.4 mm (2.7 in)	31 October 1997
Nov	49.8 mm (2.0 in)	5 November 2015
Dec	57.4 mm (2.3 in)	4 December 1966

Latest Records

Latest records at Koolunga
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 August 2026	Koolunga, AU	daily rain	18.2 mm (0.7 in)	7.2 mm (0.28 in)	41 years	20 of 100 (Routine)
9 August 2026	Koolunga, AU	daily rain	15.2 mm (0.6 in)	1.8 mm (0.07 in)	7 years	16 of 100 (Routine)
4 June 2026	Koolunga, AU	daily rain	18.9 mm (0.7 in)	2.4 mm (0.09 in)	129 years	20 of 100 (Routine)
17 March 2026	Koolunga, AU	daily rain	23.6 mm (0.9 in)	14.7 mm (0.6 in)	76 years	20 of 100 (Routine)
2 March 2026	Koolunga, AU	daily rain	27.8 mm (1.1 in)	8.7 mm (0.34 in)	104 years	51 of 100 (Notable)
26 July 2025	Koolunga, AU	daily rain	17.8 mm (0.7 in)	7.9 mm (0.31 in)	96 years	20 of 100 (Routine)
11 December 2023	Koolunga, AU	daily rain	19.9 mm (0.8 in)	4.7 mm (0.19 in)	120 years	20 of 100 (Routine)
10 December 2023	Koolunga, AU	daily rain	24.0 mm (0.9 in)	5.8 mm (0.23 in)	37 years	20 of 100 (Routine)
18 August 2023	Koolunga, AU	daily rain	19.0 mm (0.7 in)	8.2 mm (0.32 in)	26 years	20 of 100 (Routine)
15 April 2023	Koolunga, AU	daily rain	13.4 mm (0.5 in)	2.7 mm (0.11 in)	122 years	20 of 100 (Routine)
13 November 2022	Koolunga, AU	daily rain	15.2 mm (0.6 in)	3.2 mm (0.13 in)	12 years	17 of 100 (Routine)
1 November 2022	Koolunga, AU	daily rain	26.8 mm (1.1 in)	5.2 mm (0.20 in)	95 years	46 of 100 (Notable)
23 October 2022	Koolunga, AU	daily rain	54.2 mm (2.1 in)	39.0 mm (1.5 in)	109 years	80 of 100 (Exceptional)
9 September 2022	Koolunga, AU	daily rain	21.0 mm (0.8 in)	1.6 mm (0.06 in)	5 years	14 of 100 (Routine)
8 September 2022	Koolunga, AU	daily rain	25.3 mm (1.0 in)	7.5 mm (0.30 in)	17 years	29 of 100 (Routine)
23 January 2022	Koolunga, AU	daily rain	25.8 mm (1.0 in)	1.2 mm (0.05 in)	129 years	41 of 100 (Notable)
12 November 2021	Koolunga, AU	daily rain	31.7 mm (1.2 in)	6.0 mm (0.24 in)	60 years	37 of 100 (Notable)
4 July 2021	Koolunga, AU	daily rain	17.6 mm (0.7 in)	6.2 mm (0.24 in)	52 years	20 of 100 (Routine)
6 December 2020	Koolunga, AU	daily rain	15.0 mm (0.6 in)	1.0 mm (0.04 in)	28 years	19 of 100 (Routine)
1 February 2020	Koolunga, AU	daily rain	60.8 mm (2.4 in)	38.7 mm (1.5 in)	92 years	72 of 100 (Major)

Extremes by Year

1884 to 2026

Yearly extremes at Koolunga: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	103.9 mm (4.1 in)	1889	29.0 mm (1.1 in)	143
Wettest five days (Rx5day)	160.4 mm (6.3 in)	1973	44.2 mm (1.7 in)	143
Longest dry spell (CDD)	82 days	2024	38 days	143

Wettest day (Rx1day)

The wettest day of the year at Koolunga, 1884 to 2026. The record is 103.9 mm (4.1 in) in 1889, marked on the chart; the median year is 29.0 mm (1.1 in).

Wettest day (Rx1day) at Koolunga by year
Year	Wettest day (Rx1day)
1884	20.8 mm (0.8 in)
1885	28.2 mm (1.1 in)
1886	22.4 mm (0.9 in)
1887	27.9 mm (1.1 in)
1888	24.1 mm (0.9 in)
1889	103.9 mm (4.1 in)
1890	33.3 mm (1.3 in)
1891	27.2 mm (1.1 in)
1892	24.6 mm (1.0 in)
1893	34.3 mm (1.4 in)
1894	33.3 mm (1.3 in)
1895	20.6 mm (0.8 in)
1896	30.5 mm (1.2 in)
1897	19.8 mm (0.8 in)
1898	27.2 mm (1.1 in)
1899	17.3 mm (0.7 in)
1900	21.6 mm (0.9 in)
1901	19.3 mm (0.8 in)
1902	40.1 mm (1.6 in)
1903	43.2 mm (1.7 in)
1904	30.0 mm (1.2 in)
1905	35.6 mm (1.4 in)
1906	25.4 mm (1.0 in)
1907	25.4 mm (1.0 in)
1908	42.7 mm (1.7 in)
1909	18.0 mm (0.7 in)
1910	75.2 mm (3.0 in)
1911	18.3 mm (0.7 in)
1912	19.3 mm (0.8 in)
1913	24.9 mm (1.0 in)
1914	18.0 mm (0.7 in)
1915	27.9 mm (1.1 in)
1916	25.9 mm (1.0 in)
1917	33.0 mm (1.3 in)
1918	20.6 mm (0.8 in)
1919	32.0 mm (1.3 in)
1920	39.9 mm (1.6 in)
1921	25.4 mm (1.0 in)
1922	38.1 mm (1.5 in)
1923	41.1 mm (1.6 in)
1924	31.5 mm (1.2 in)
1925	30.0 mm (1.2 in)
1926	20.6 mm (0.8 in)
1927	21.6 mm (0.9 in)
1928	24.6 mm (1.0 in)
1929	54.6 mm (2.1 in)
1930	36.3 mm (1.4 in)
1931	23.4 mm (0.9 in)
1932	40.6 mm (1.6 in)
1933	27.9 mm (1.1 in)
1934	16.3 mm (0.6 in)
1935	21.8 mm (0.9 in)
1936	25.9 mm (1.0 in)
1937	49.3 mm (1.9 in)
1938	20.1 mm (0.8 in)
1939	69.1 mm (2.7 in)
1940	18.3 mm (0.7 in)
1941	57.4 mm (2.3 in)
1942	44.5 mm (1.8 in)
1943	57.9 mm (2.3 in)
1944	21.6 mm (0.9 in)
1945	28.2 mm (1.1 in)
1946	83.3 mm (3.3 in)
1947	26.4 mm (1.0 in)
1948	28.7 mm (1.1 in)
1949	41.7 mm (1.6 in)
1950	47.2 mm (1.9 in)
1951	27.2 mm (1.1 in)
1952	32.8 mm (1.3 in)
1953	17.3 mm (0.7 in)
1954	30.0 mm (1.2 in)
1955	16.0 mm (0.6 in)
1956	25.4 mm (1.0 in)
1957	19.1 mm (0.8 in)
1958	24.9 mm (1.0 in)
1959	14.0 mm (0.6 in)
1960	25.7 mm (1.0 in)
1961	46.5 mm (1.8 in)
1962	19.8 mm (0.8 in)
1963	41.1 mm (1.6 in)
1964	37.8 mm (1.5 in)
1965	29.7 mm (1.2 in)
1966	57.4 mm (2.3 in)
1967	22.9 mm (0.9 in)
1968	21.3 mm (0.8 in)
1969	27.7 mm (1.1 in)
1970	32.8 mm (1.3 in)
1971	32.8 mm (1.3 in)
1972	31.2 mm (1.2 in)
1973	86.6 mm (3.4 in)
1974	44.8 mm (1.8 in)
1975	31.6 mm (1.2 in)
1976	43.2 mm (1.7 in)
1977	26.2 mm (1.0 in)
1978	24.0 mm (0.9 in)
1979	41.8 mm (1.6 in)
1980	81.4 mm (3.2 in)
1981	20.8 mm (0.8 in)
1982	19.2 mm (0.8 in)
1983	37.0 mm (1.5 in)
1984	13.4 mm (0.5 in)
1985	41.0 mm (1.6 in)
1986	29.4 mm (1.2 in)
1987	22.8 mm (0.9 in)
1988	29.8 mm (1.2 in)
1989	33.2 mm (1.3 in)
1990	28.6 mm (1.1 in)
1991	34.8 mm (1.4 in)
1992	41.2 mm (1.6 in)
1993	33.6 mm (1.3 in)
1994	53.0 mm (2.1 in)
1995	29.0 mm (1.1 in)
1996	17.6 mm (0.7 in)
1997	68.4 mm (2.7 in)
1998	30.0 mm (1.2 in)
1999	29.4 mm (1.2 in)
2000	34.6 mm (1.4 in)
2001	29.8 mm (1.2 in)
2002	18.2 mm (0.7 in)
2003	40.4 mm (1.6 in)
2004	23.2 mm (0.9 in)
2005	24.2 mm (1.0 in)
2006	28.0 mm (1.1 in)
2007	59.4 mm (2.3 in)
2008	37.0 mm (1.5 in)
2009	21.6 mm (0.9 in)
2010	32.6 mm (1.3 in)
2011	46.6 mm (1.8 in)
2012	28.4 mm (1.1 in)
2013	33.2 mm (1.3 in)
2014	38.8 mm (1.5 in)
2015	49.8 mm (2.0 in)
2016	27.0 mm (1.1 in)
2017	19.2 mm (0.8 in)
2018	17.6 mm (0.7 in)
2019	41.0 mm (1.6 in)
2020	60.8 mm (2.4 in)
2021	31.7 mm (1.2 in)
2022	54.2 mm (2.1 in)
2023	25.8 mm (1.0 in)
2024	24.6 mm (1.0 in)
2025	21.4 mm (0.8 in)
2026	27.8 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Koolunga, 1884 to 2026. The record is 160.4 mm (6.3 in) in 1973, marked on the chart; the median year is 44.2 mm (1.7 in).

Wettest five days (Rx5day) at Koolunga by year
Year	Wettest five days (Rx5day)
1884	35.1 mm (1.4 in)
1885	29.2 mm (1.1 in)
1886	36.6 mm (1.4 in)
1887	41.9 mm (1.6 in)
1888	26.9 mm (1.1 in)
1889	136.2 mm (5.4 in)
1890	48.9 mm (1.9 in)
1891	29.3 mm (1.2 in)
1892	26.4 mm (1.0 in)
1893	36.6 mm (1.4 in)
1894	34.1 mm (1.3 in)
1895	28.5 mm (1.1 in)
1896	33.0 mm (1.3 in)
1897	24.1 mm (0.9 in)
1898	44.5 mm (1.8 in)
1899	33.8 mm (1.3 in)
1900	50.7 mm (2.0 in)
1901	32.2 mm (1.3 in)
1902	47.5 mm (1.9 in)
1903	48.3 mm (1.9 in)
1904	42.1 mm (1.7 in)
1905	54.9 mm (2.2 in)
1906	35.0 mm (1.4 in)
1907	43.2 mm (1.7 in)
1908	59.4 mm (2.3 in)
1909	44.2 mm (1.7 in)
1910	77.2 mm (3.0 in)
1911	38.1 mm (1.5 in)
1912	35.6 mm (1.4 in)
1913	40.3 mm (1.6 in)
1914	18.0 mm (0.7 in)
1915	34.7 mm (1.4 in)
1916	43.7 mm (1.7 in)
1917	57.4 mm (2.3 in)
1918	27.8 mm (1.1 in)
1919	58.4 mm (2.3 in)
1920	49.8 mm (2.0 in)
1921	61.2 mm (2.4 in)
1922	58.2 mm (2.3 in)
1923	41.1 mm (1.6 in)
1924	37.6 mm (1.5 in)
1925	35.8 mm (1.4 in)
1926	50.0 mm (2.0 in)
1927	22.6 mm (0.9 in)
1928	36.6 mm (1.4 in)
1929	84.6 mm (3.3 in)
1930	45.7 mm (1.8 in)
1931	33.2 mm (1.3 in)
1932	42.4 mm (1.7 in)
1933	44.7 mm (1.8 in)
1934	21.8 mm (0.9 in)
1935	27.1 mm (1.1 in)
1936	33.0 mm (1.3 in)
1937	54.4 mm (2.1 in)
1938	29.0 mm (1.1 in)
1939	99.6 mm (3.9 in)
1940	27.0 mm (1.1 in)
1941	83.8 mm (3.3 in)
1942	50.6 mm (2.0 in)
1943	87.2 mm (3.4 in)
1944	30.5 mm (1.2 in)
1945	46.2 mm (1.8 in)
1946	114.6 mm (4.5 in)
1947	46.0 mm (1.8 in)
1948	35.3 mm (1.4 in)
1949	52.3 mm (2.1 in)
1950	55.3 mm (2.2 in)
1951	43.7 mm (1.7 in)
1952	57.2 mm (2.3 in)
1953	34.8 mm (1.4 in)
1954	32.8 mm (1.3 in)
1955	30.2 mm (1.2 in)
1956	28.5 mm (1.1 in)
1957	26.1 mm (1.0 in)
1958	33.2 mm (1.3 in)
1959	21.1 mm (0.8 in)
1960	39.4 mm (1.6 in)
1961	56.9 mm (2.2 in)
1962	31.4 mm (1.2 in)
1963	76.4 mm (3.0 in)
1964	43.2 mm (1.7 in)
1965	35.9 mm (1.4 in)
1966	121.7 mm (4.8 in)
1967	23.4 mm (0.9 in)
1968	48.3 mm (1.9 in)
1969	38.4 mm (1.5 in)
1970	52.6 mm (2.1 in)
1971	46.8 mm (1.8 in)
1972	47.0 mm (1.9 in)
1973	160.4 mm (6.3 in)
1974	94.4 mm (3.7 in)
1975	44.8 mm (1.8 in)
1976	75.8 mm (3.0 in)
1977	35.2 mm (1.4 in)
1978	53.8 mm (2.1 in)
1979	62.0 mm (2.4 in)
1980	120.8 mm (4.8 in)
1981	33.2 mm (1.3 in)
1982	24.2 mm (1.0 in)
1983	39.2 mm (1.5 in)
1984	23.4 mm (0.9 in)
1985	42.0 mm (1.7 in)
1986	61.4 mm (2.4 in)
1987	38.8 mm (1.5 in)
1988	51.0 mm (2.0 in)
1989	91.0 mm (3.6 in)
1990	72.6 mm (2.9 in)
1991	72.2 mm (2.8 in)
1992	51.8 mm (2.0 in)
1993	76.6 mm (3.0 in)
1994	82.8 mm (3.3 in)
1995	49.8 mm (2.0 in)
1996	40.8 mm (1.6 in)
1997	75.0 mm (3.0 in)
1998	34.8 mm (1.4 in)
1999	34.6 mm (1.4 in)
2000	62.6 mm (2.5 in)
2001	38.8 mm (1.5 in)
2002	30.2 mm (1.2 in)
2003	57.8 mm (2.3 in)
2004	39.2 mm (1.5 in)
2005	35.4 mm (1.4 in)
2006	48.6 mm (1.9 in)
2007	68.2 mm (2.7 in)
2008	50.0 mm (2.0 in)
2009	51.4 mm (2.0 in)
2010	47.0 mm (1.9 in)
2011	49.0 mm (1.9 in)
2012	41.2 mm (1.6 in)
2013	59.2 mm (2.3 in)
2014	65.2 mm (2.6 in)
2015	89.2 mm (3.5 in)
2016	53.0 mm (2.1 in)
2017	32.2 mm (1.3 in)
2018	28.2 mm (1.1 in)
2019	56.0 mm (2.2 in)
2020	64.2 mm (2.5 in)
2021	52.8 mm (2.1 in)
2022	67.0 mm (2.6 in)
2023	71.1 mm (2.8 in)
2024	39.8 mm (1.6 in)
2025	40.6 mm (1.6 in)
2026	48.8 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Koolunga, 1884 to 2026. The record is 82 days in 2024, marked on the chart; the median year is 38 days.

Longest dry spell (CDD) at Koolunga by year
Year	Longest dry spell (CDD)
1884	23 days
1885	26 days
1886	62 days
1887	59 days
1888	39 days
1889	40 days
1890	26 days
1891	81 days
1892	30 days
1893	44 days
1894	62 days
1895	45 days
1896	66 days
1897	52 days
1898	39 days
1899	32 days
1900	28 days
1901	38 days
1902	29 days
1903	25 days
1904	43 days
1905	61 days
1906	36 days
1907	37 days
1908	28 days
1909	49 days
1910	32 days
1911	35 days
1912	48 days
1913	35 days
1914	36 days
1915	38 days
1916	28 days
1917	27 days
1918	35 days
1919	35 days
1920	66 days
1921	49 days
1922	49 days
1923	50 days
1924	32 days
1925	38 days
1926	37 days
1927	30 days
1928	35 days
1929	48 days
1930	50 days
1931	26 days
1932	35 days
1933	34 days
1934	40 days
1935	42 days
1936	47 days
1937	51 days
1938	48 days
1939	41 days
1940	31 days
1941	28 days
1942	45 days
1943	43 days
1944	36 days
1945	42 days
1946	35 days
1947	28 days
1948	37 days
1949	38 days
1950	35 days
1951	51 days
1952	54 days
1953	45 days
1954	49 days
1955	38 days
1956	31 days
1957	67 days
1958	36 days
1959	46 days
1960	24 days
1961	36 days
1962	34 days
1963	46 days
1964	36 days
1965	70 days
1966	31 days
1967	71 days
1968	28 days
1969	33 days
1970	49 days
1971	21 days
1972	50 days
1973	47 days
1974	28 days
1975	38 days
1976	43 days
1977	28 days
1978	46 days
1979	34 days
1980	40 days
1981	36 days
1982	48 days
1983	30 days
1984	45 days
1985	43 days
1986	56 days
1987	57 days
1988	44 days
1989	64 days
1990	34 days
1991	44 days
1992	36 days
1993	37 days
1994	43 days
1995	33 days
1996	55 days
1997	40 days
1998	33 days
1999	45 days
2000	31 days
2001	30 days
2002	37 days
2003	34 days
2004	45 days
2005	39 days
2006	38 days
2007	56 days
2008	45 days
2009	60 days
2010	37 days
2011	31 days
2012	29 days
2013	27 days
2014	32 days
2015	68 days
2016	31 days
2017	28 days
2018	26 days
2019	45 days
2020	28 days
2021	26 days
2022	22 days
2023	50 days
2024	82 days
2025	79 days
2026	52 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

137 years, 1885 to 2025

A day with at least 29.2 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 93.5 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Koolunga: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	29.2 mm (1.1 in)
5 years	41.4 mm (1.6 in)
10 years	51.1 mm (2.0 in)
25 years	65.8 mm (2.6 in)
50 years	78.7 mm (3.1 in)
100 years	93.5 mm (3.7 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 137 years of values from 1885 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 103.9 mm (4.1 in) in 1889; 86.6 mm (3.4 in) in 1973; 83.3 mm (3.3 in) in 1946.

Download the Data

Data for Koolunga standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Koolunga threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a